Pruning saw jointer



1952 w. w. BROWN ,582, 01

PRUNING SAW JOINTER Filed Jun; 27, 1949 Will l'am W. Bro wn JNVEN TOR;

BY 2s MFM;

Patented Jan. 8, 19:52

I. I PRUNING SAW .ioIN'iiin William W. BrownjWheatIand, Calif.

Thisinvention relates-t new and useful improvements in saw jointers andmore particularly to an adjustable saw jointer.

The primary object of the present invention is-to provide a device tohold a resilient file or abrasive and adjustably control the bending ofthe same to file articles of difierent curvature.

Another important object is to provide a saw jointer adjustable toaccommodate saws of different thicknes s.;-

Another object is to provide a saw jointer that affords a maximumprotection against injury to the user.

Important features of the present invention are the adjusting meanscontrolling both the concave or convex curvature of the file, theprovision of hand holds, which also serve as viewing openings, and thehousing formed of two parts.

Other objects, features and advantages reside in the details ofconstruction and operation as more fully hereinafter described andclaimed, reference being had to the accompanying drawings forming parthereof, wherein like numerals refer to like parts throughout, and inwhich:

Figure 1 is a side elevation of the saw jointer in operating position;

Figure 2 is a vertical transverse sectional View taken substantiallyupon the plane of the section line 2-2 of Figure 1;

Figure 3 is a vertical transverse sectional view taken substantiallyupon the plane of the section line 33 of Figure 1; and

Figure 4 is a bottom view of the holder as shown in Figure 1.

Referring now to the drawings in detail, wherein for the purpose ofillustration is disclosed a preferred embodiment of the presentinvention, the numeral it denotes the jointer generally.

The jointer i t is formed by the sections I2 and 14 held together by thescrews It and has a medial slot l8 therebetween for receiving thetoothed edge of the saw 20. The side sections [2 and M are so formedthat on the assembly of the jointer Ill there are recesses 22 formedtherein (see Figures 2 and 3) which form openings through which a file24 is slidingly received. As seen in Figure 2, the central recess 22 isconsiderably larger than the outer recesses, one of which is shown inFigure 3.

The file 24 is shown with two cutting surfaces and may be of anyflexible type, metallic or otherwise. If desired, the file could beprovided with only one cutting surface.

The ends of the file 24 are adjustably clamped, by screws 26, within theouter recesses 22, as

ill

Application June 27, 1949, Serial No.1f'o1,567 10laim. (01. 76-47) 2shown in Figure 3. It is apparent that this means of clamping the file24 permits lateral movement of the file 24 allowing the user to placenew cutting surfaces in alignment withthe slot [8. Bosses 28 areprovided on the section l2 and Hi to enlarge the extent of this" lateralmovement of the file 24.- Hand holds 38 are provided in the jointer I 0to permit the user to grasp the jointer firmly andto prevent possiblehand injury that could be caused by the hand slipping and striking thetoothed edgeof the saw 26. It will be seen in Figure 1- that the handholds 3ilprovide openings through which the user may visually observethe file flexing operation to be explained later.

The side sections I2 and I4 are provided with a centrally located,internally threaded bore 32 to receive an adjusting screw 34.

With the foregoing description and the illustrations, it is believed theoperation of the device will be readily understood. To adjust thejointer for use with a saw whose toothed edge is concave, as shown inFigure 1, the file 24 is inserted through the recesses 22 and clampedtherein by the screws 26, thereby securing both ends of the file 24. Thejointer is then placed in operating position upon the saw 20 and thefile 24 is adjustably flexed by means of the screw 34 to conform to theconcave toothed edge of the saw 20. As stated earlier, the hand holds 30permit, the operator to see the flexing of the file 24 thus enabling himto readily make the flexing adjustment.

The procedure required to adapt the jointer for use with a saw having aconvex-shaped toothed edge is somewhat different. The file 24 is placedwithin the recesses 22 and secured at only one end by means of thescrews 26. The jointer is then placed on the saw in operating positionand is pressed in against the saw edge snugly enough to flex the file 24so that it will conform to the curvature of the saw 28. While holdingthe jointer in this position, the other end of the file 24 is clamped bymeans of the screws 2%. After, thus locking both ends of the file 24,the adjusting screw 34 is set so as to have its lower end just engagethe upper surface of the file.

Regardless of whether the jointer is adjusted for curved or convex saws,the jointer is used in the usual manner, the slot 18 serving as a guide.

It is obvious that spacing means may be used between the side sections[2 and M to vary the width of the slot 18, thus serving as an adjustmentto accommodate saws of different thicknesses. It is equally apparentthat the lower portion of the housing may be eliminated altogether, thatis, the portion that guides the saw relative to the file, thus forming adevice in which the entire lower surface of the file 24 may be usedsimultaneously, and thereby being useful for many other purposes thanjointing saws. Such other purposes or uses including the filing ofcurved surfaces, either convex or concave.

In view of the foregoing description taken in conjunction with theaccompanying drawings it is believed that a clear understanding of thedevice will be quite apparent to those skilled in this art. A moredetailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shownand described a preferred embodiment of the invention, the same issusceptible to certain changes fully comprehended by the spirit of theinvention as herein described and the scope of the appended claim.

Having described the invention, what is claimed as new is:

A saw jointer comprising a pair of separable complementary body sectionsforming a housing, the juxtaposed surfaces of said body sections havingregistering channels therein defining a recess in said housing forreceiving a file, the juxtaposed surfaces of the body sections beingspaced at one side of the channels to define a longitudinal medial slotin the housing that communicates with the recess, the juxtaposedsurfaces of the body sections having registering grooves that are on theother side of the channels and perpendicular thereto that define aninternally threaded bore in the housing that intersects the recess, athreaded shank in the bore for adjustably bearing against a file in therecess, threaded means securing the body sections together, and meansspaced on opposite sides of the shank for clamping a file in the recess.

WILLIAM W. BROWN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 277,364 Smith May 8, 1883 298,820Bozard May 20, 1884 444,848 Pratt Jan. 20, 1891 605,550 King June 14,1898 977,233 Stecker Nov. 29, 1910 982,458 Andrews Jan. 24, 19111,330,042 Knizek Feb. 3, 1920 1,538,227 Thunborg May 19, 1925 1,731,933Morin Oct. 15, 1929 FOREIGN PATENTS Number Country Date 46,035 SwedenSept. 27, 1917 OTHER REFERENCES Iron Age Practical Saw Jointer, Nov. 15,1888, page 763.

